Harrow



UNITED STATES PATENT OFFICE.

\VILLIAM D. NAPIER, OF MOUNTAIN HOME, ARKANSAS.

HARROW.

SPECIFICATION forming part of Letters Patent No. 434,290, dated August 12, 1890.

Application filed March 28,1890. Serial No. 345,723. (No model.)

To all whom it may concern.-

Be it known that I, WILLIAM D. NAPIER, a citizen of the United States, residing at Mountain Home, in the county of Baxter and State of Arkansas, have invented a new and useful Harrow, of which the following is aspecification.

This invention has relation to wheeled harrows; and the objects in view are to provide a simple and inexpensive means for raising and lowering the barrow-frame and thus increasing or decreasing the depth of penetration of the teeth of the harrow, or wholly elevating the frame and teeth above the surface of the ground, for the purpose of transferring the harrow from field to field, as may be desired.

The novel mechanism hereinafter described maybe employed in various styles of harrows, whether the walking or riding class, and in various forms of barrow-frames. NVith the above general objects in view the invention consists-in certain features of construction hereinafter specified, and particularly pointed out in the claims.

Referring to the drawings, Figure 1 is a top plan of a harrow provided with improvements in accordance with my invention. Fig. 2 is a detail in perspective of the front wheel and its operating crank-arms. Fig. 3 is a similar view of the rear axle. Fig. 4 is a longitudinal section taken to one'side 0f the operating-lever. Fig. 5 is a side elevation in detail of the lever.

Like numerals of reference indicate like parts in all the figures of the drawings.

I have herein illustrated my invention as applied to an ordinary triangular barrow-frame but it will be apparent from the following description, takenin connection with the annexed drawings, that the invention is equally applicable to all the variousstyles and types of barrow-frames. The barrow-frame in this instance comprises the rear transverse bar 1, to the opposite ends of which are secured the two converging side bars 2. The bars 1 and 2 are each provided with the usual harrowteeth 3, and the side bars in this instance are braced and connected by an intermediate transverse bar 4, which latter bar is at its center connected to the rear bar 1 by a short crosspiece 5. In the'front end of the frame is mounted the ordinary clevis or draft-bail 6.

7 represents the front wheel',which is located the extremitiesbeyond the sidobarsbeing bent to form crank-arms 15 and terminating laterally in bearings 16, upon which are mounted the rear harrow-frame-supporting wheels 17. Intermediate its bearings the rear axle is cranked centrally, as at 18, and bya pair of crossed connecting-rods 19, pivoted to said cranked portion, is connected to the diagonally-opposite eyes 11, formed at the outer extremities of the crank-arms 9.

Upon the cross-piece 5 is pivoted the operating-lever 21, and adjacent to the same is arranged a toothed locking bar or sector 28.

24 represents a sliding gravity-lever of hellcrank shape, secured at its lower end in sliding contact with the lever 21 by means of a collar 20. The lower extremity of the lever 24 is laterally bent, as at 27, to interlock with the teeth of the locking-bar, and the upper extremity is shaped to form a handle 22. Im- Inediately below the same the lever 24 is connected with the lever 21, by means of a U- shaped shackle 23, the extremities of which are pivoted to the levers 21 and 24. Upon the cranked portion of the rear axle is mounted a clip 30, which, bya connecting-rod 29, is connected with the pivoted lever 21 below the gravity-lever, so that any movement upon the part of the lever 21 upon its pivot causes a similar movement upon the two cranked axles of the harrow-frame. In this manner it is apparent that the frame may be raised and lowered, and with it the harrow-teeth, so that the teeth will be elevated above the ground, thus adapting the harrow to be dragged from one field to another, or from place to place, or said barrow-frame may be raised or lowered to such a point as will permit the harrow-teeth to pene-- trate the ground to a desired depth.- In any of its various elevations the frame is locked securely against falling by means of the gravity-lever 24, which lever may be manipulated, together with the operating-lever 21, either from the harrow or from the ground by the attendant, as will be readily understood.

Having thus described my invention, What I claim is 1. The combination, with a harroml'rame and opposite cranked axles connected to each other, of a pivoted lever and a connecting-bar connecting said lever with one of the axles, a toothed locking-sector arranged adjacent to the lever, a bell-crank-shaped gravity-lever, a sliding collar mounted on the pivoted lever and connected with the bell-crank lever and adapted for sliding upon the pivoted lever, and a U -shaped shackle or link connecting the upper ends of the two levers, said locking-lever being adapted at its lower end to engage the locking-sector, substantially as specified.

2. The combination, with the opposite converging side bars, the rear and intermediate connecting-bars, and the short transverse bar 5, of the front wheel 7, its axle 8, the opposite cranks 9, having bearings 10 and terminating in eyes 11, the rear axle mounted in bearings 14, formed in the side bars, centrally cranked and oppositely cranked outside of its bearings, ground-wheels mounted on the crank portion, rods connecting the centrally-cranked portion with the eyes of the front cranks, the lever 21, pivoted in the cross-bar 5, the connecting-bar 29, connecting the rear axle and said lever, the toothed locking-sector arranged adjacent to the lever, the bell-crank-shaped gravity-lever and its sleeve for connecting the same with the operating-lever, and the loose link connecting the upper end of said gravitylever with the operating-lever, which latter terminates above the link in ahandle and at its opposite extremity bent to engage the teeth of. the sector, substantially as specified.

3. The combination, with the opposite convergingsidebars and therear and intermediate connecting-bars, of the front wheel 7, its axle 8, the opposite cranks 9, having bearings 10, the rear axle mounted in bearings 14 in the side bars, centrally cranked and oppositely cranked outside of its bearings, ground-Wheels mounted on the crank portion, rods connecting the centrally-cranked portion with the front cranks, the lever 21, and the connecting-bar 29 connecting the rear axle and said lever, substantially as specified.

I11 testimony that I claim the foregoing as my own I have hereto affixed my signature in presence of two witnesses.

\VILLIAM I). NAPIER.

\Vitnesses:

WM. H. MORRIS, Ms 'A. HARRIS. 

